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A loaded freight car has 5 times as much mass as an empty freightcar. If the loaded car coasts at 2.0 m/s and collides withand attaches to the empty car at rest, what will be the speed of both cars after collision?
If a person radiates about 65.00 W of power at room temperature, how long does it take for a person to radiate away the energy acquired by consuming a 230 Calorie donut.
A 0.47 kg piece of wood floats in water but is found to sink in alcohol (specific gravity = 0.79) in which it has an apparent mass of 0.034 kg. What is the SG of the wood
A charge of -2.45 nC and acharge of -5.65 nC are separatedby a distance of 70.0 cm. Find the position at which a third charge of +7.20 nC can be placed so that the net electrostatic force on it is zero. a) cm from the -2.45 nC charge b)cm fromthe -5...
Calculate the thermal de Broglie wavelengths for helium-4 (boson) and helium-3 (fermion) gases at T = 5K
They want to dock, which means they have to arrive at the same position at the same time with zero velocity. (a) What should the initial velocity of the second spacecraft be? (b) Illustrate what should be its constant acceleration?
A 5.0 kg scientific instrument, an air sampler, is tied to a weather balloon by a rope. If the upward acceleration of the balloon is 3.4 m/s2, find the tension in the rope
An infinite line of positive charge lies along the y axis, with charge density ? = 1.60 ?C/m. Find the magnitude of the net torque exerted on the dipole
A cosmic-ray proton in interstellar space has an energy of 17.0 MeV and executes a circular orbit having a radius equal to that of Earth's orbit around the Sun, What is the magnetic field in that region of space
assume with the tight-binding framework that we need to consider only 1 wannier orbital from each site. the energy
a construction worker attempts to lift a uniform beam off the floor and raise it to a vertical position. the beam is
In a lightening bolt, current travels upward, from ground to cloud.Suppose that at the moment that a 35,000, what is the magnitude and direction of the magnetic force on the airplane
A girl whirls a stone attached to a string 1.0m long in a circle with uniform speed. calculate the force provided by the rope to maintain the circular motion of the stone if the mass of the stone is 30.0g
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